Official statement
Other statements from this video 28 ▾
- 4:42 Le nombre de pages en noindex impacte-t-il vraiment le classement SEO ?
- 4:42 Trop de pages en noindex pénalisent-elles vraiment le classement ?
- 6:02 Les pages 404 dans votre arborescence tuent-elles vraiment votre crawl budget ?
- 6:02 Les pages 404 dans la structure d'un site nuisent-elles vraiment au crawl ?
- 7:55 Peut-on cibler les mêmes requêtes avec plusieurs sites sans risquer de pénalité ?
- 12:27 Faut-il vraiment vérifier les Webmaster Guidelines avant chaque optimisation SEO ?
- 16:16 La conformité technique garantit-elle vraiment un bon SEO ?
- 19:58 Pourquoi une redirection HTTPS vers HTTP peut-elle paralyser votre indexation ?
- 19:58 Faut-il vraiment supprimer tous les paramètres URL de vos pages ?
- 19:58 Faut-il vraiment déclarer une balise canonical sur toutes vos pages ?
- 19:58 Pourquoi une redirection HTTPS vers HTTP paralyse-t-elle la canonicalisation ?
- 21:07 Faut-il vraiment abandonner les paramètres d'URL pour des structures « significatives » ?
- 21:25 Faut-il vraiment mettre une balise canonical sur TOUTES vos pages, même les principales ?
- 22:22 Google peine-t-il vraiment à distinguer sous-domaine et domaine principal ?
- 25:27 Faut-il vraiment séparer sous-domaines et domaine principal pour que Google les distingue ?
- 26:26 La réputation locale suffit-elle à déclencher le référencement géolocalisé ?
- 29:56 Contenu mobile ≠ desktop : pourquoi Google pénalise-t-il encore cette pratique après le Mobile-First Index ?
- 29:57 Peut-on vraiment négliger la version desktop avec le mobile-first indexing ?
- 43:04 L'API d'indexation garantit-elle vraiment une indexation immédiate de vos pages ?
- 43:06 La soumission d'URL dans Search Console accélère-t-elle vraiment l'indexation ?
- 44:54 Pourquoi Google refuse-t-il systématiquement de détailler ses algorithmes de classement ?
- 46:46 Faut-il vraiment choisir entre ciblage géographique et hreflang pour son référencement international ?
- 46:46 Ciblage géographique vs hreflang : faut-il vraiment choisir entre les deux ?
- 53:14 Faut-il vraiment afficher toutes les images marquées en données structurées sur vos pages ?
- 53:35 Pourquoi Google interdit-il de marquer en structured data des images invisibles pour l'utilisateur ?
- 64:03 Faut-il vraiment normaliser les slashs finaux dans vos URLs ?
- 66:30 Faut-il vraiment ignorer les erreurs non résolues dans Search Console ?
- 66:36 Faut-il s'inquiéter des erreurs 5xx résolues qui persistent dans Search Console ?
Google states that owning multiple sites with closely related content is not automatically considered spam, as long as webmaster guidelines are followed. Each site is evaluated individually for potential violations. What truly matters is the method and intention — not merely the presence of multiple domains with similar themes.
What you need to understand
Why does Google clarify that similar sites are not automatically considered spam? <\/h3>
This statement addresses a common confusion: many believe that multiplying domains <\/strong> with similar content automatically triggers an anti-spam filter. Google clarifies that this is not the case — at least not systematically.<\/p> The algorithm evaluates each site independently <\/strong>. If your domains adhere to the guidelines, provide genuine added value, and do not attempt to manipulate results, you are not on their radar. It is the intention and the method <\/strong> that determine if you cross the line.<\/p> The line is drawn by the perceived value to the user <\/strong>. A group of legitimate sites may cover related topics with different angles, targeted audiences, or complementary services. Each domain brings something distinct.<\/p> In contrast, a spam network massively duplicates generic content, uses artificial link schemes <\/strong> between domains, and aims solely to saturate SERPs to capture traffic. The content lacks depth, the sites are interchangeable, and the goal is purely manipulative.<\/p> Google’s guidelines prohibit practices like cloaking <\/strong>, keyword stuffing, misleading redirects, artificial link networks, and automatically generated content of no value. If your sites avoid these pitfalls, you are theoretically in the clear.<\/p> But beware: "adhering to the guidelines" does not guarantee a good ranking. Google also assesses overall quality <\/strong>, E-E-A-T, relevance, and user experience. A technically compliant but mediocre site can stagnate on page 3 without formally violating any rules.<\/p>What distinguishes a legitimate network from a spam network? <\/h3>
What does it really mean to "adhere to webmaster guidelines"? <\/h3>
SEO Expert opinion
Is this statement consistent with observed practices on the ground? <\/h3>
Yes and no. Ultimately, it is indeed observed that legitimate site networks — for example, media groups with multiple brands — coexist without penalty. Google does not automatically <\/strong> penalize all multi-domain setups.<\/p> To be honest, the gray area is vast. Some niche networks with very similar content perform for months or even years before a manual action <\/strong> or algorithm update brings them down. The statement is theoretically true, but practical application depends on factors that Google never details — network size, visibility, external reports, etc. [To verify] <\/strong>: the consistency of this approach on a large scale.<\/p> First point: "individual evaluation" does not mean that Google ignores inter-domain patterns <\/strong>. If 20 sites share the same servers, identical HTML structure, the same fictitious authors, and link heavily to each other, the algorithm can detect a global pattern even without penalizing all domains at once.<\/p> Second nuance: this statement does not protect against quality filters <\/strong>. A site may be "compliant with guidelines" and still be downgraded by Helpful Content or a Core Update because its content is deemed weak. Google says here, "it’s not automatically spam," but that does not mean "you will rank." <\/p> As soon as your domains artificially link to each other to manipulate PageRank <\/strong>, you step outside the "legitimate" framework. Even if each site follows the other guidelines, this linking scheme is enough to trigger a penalty — manual or algorithmic.<\/p> Another edge case: doorway pages <\/strong>. If you create 10 nearly identical sites targeting geographical or lexical variations to redirect to a main site, you are in clear violation. Google sees this as an attempt to saturate results.<\/p>What nuances should be added to this official statement? <\/h3>
In what situations does this rule not really apply? <\/h3>
Practical impact and recommendations
What should you do if you manage multiple sites? <\/h3>
Ensure each domain has a distinct identity <\/strong>: unique editorial angle, specific audience, clearly differentiated added value. If your sites are interchangeable, you are on thin ice.<\/p> Avoid any form of artificial cross-linking <\/strong>. If a link between two of your domains adds no value to the user, don’t do it. Google is becoming increasingly adept at detecting self-sustaining linking patterns.<\/p> Do not massively duplicate content across your domains, even with minimal variations. Google may tolerate thematic overlap, but not disguised copy-pasting <\/strong>. Each site must have its own original content.<\/p> Do not overtly share the same technical infrastructure (even the same Google Analytics, Webmaster tools, hosting) without a legitimate reason. This does not trigger automatic sanctions but facilitates detection of patterns <\/strong> if one domain is inspected.<\/p> Conduct an audit of your inter-domain backlinks <\/strong>. Each link must be justifiable from a user’s perspective. If you cannot explain why this link exists other than "for SEO," remove it.<\/p> Check the quality and originality of content on each domain. Use duplication detection tools to identify excessive overlaps. A similarity rate of over 30-40% <\/strong> between two distinct domains starts to raise concerns.<\/p>What mistakes should you absolutely avoid? <\/h3>
How can you verify that your setup complies with the guidelines? <\/h3>
❓ Frequently Asked Questions
Est-ce que Google pénalise automatiquement si je possède plusieurs sites dans la même thématique ?
Puis-je faire des liens entre mes différents sites sans risque ?
Comment savoir si mon réseau de sites est considéré comme spam ?
Dois-je héberger mes sites sur des serveurs différents pour éviter une détection ?
Un site peut-il être sanctionné sans affecter les autres domaines que je possède ?
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Other SEO insights extracted from this same Google Search Central video · duration 1h13 · published on 22/04/2021
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